blockdev

 

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 BLOCKDEV(8)                                           BLOCKDEV(8)
 
 
 
NAME
        blockdev - call block device ioctls from the command line
 
SYNOPSIS
        blockdev [options] commands devices
 
DESCRIPTION
        The  utility  blockdev  allows  one  to  call block device
        ioctls from the command line.
 
OPTIONS
        -V     Print version and exit.
 
        -q     Be quiet.
 
        -v     Be verbose.
 
 COMMANDS
        --setro
               Set read-only.
 
        --setrw
               Set read-write.
 
        --getro
               Get read-only. Print 1 if the device is  read-only,
               0 otherwise.
 
        --getss
               Print sectorsize in bytes - usually 512.
 
        --getsize
               Print device capacity (in 512-byte sectors).
 
        --setra N
               Set readahead to N 512-byte sectors.
 
        --getra
               Print readahead (in 512-byte sectors).
 
        --flushbufs
               Flush buffers.
 
        --rereadpt
               Reread partition table.
 
 
 
                              May 2000                 BLOCKDEV(8)

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